A simple seashells based modelled from the common Turritellid seashell.

See here for video: https://youtu.be/dUEOYucI38k

This model is part of a pair of Turritellid shells. Download the pair here:

Short: https://than.gs/m/929031
Long: https://than.gs/m/929033

The small spiral has six logarithmic revolutions; the large spiral has ten logarithmic revolutions.

Print as oriented with the larger end down. Raise the model off the build plate about 3mm and generate tree supports underneath. It is best to print at least two at a time for best results.